Thermostat



FIG. 1 is a perspective view of a thermostat showing my new design;

FIG. 2 is a top view thereof;

FIG. 3 is a bottom view thereof;

FIG. 4 is a front elevational view thereof;

FIG. 5 is a rear view thereof;

FIG. 6 is a right-side elevational view thereof;

FIG. 7 is a left-side elevational view thereof; and,

FIG. 8 is a perspective view thereof showing features behind the front panel, the broken lines being illustrative of envirionmental structure only and forming no part of the claimed design. 

The ornamental design for a thermostat, as shown and described. 